how to check for vacuum leak 1994 ford escort lx 1.9l

1994 FORD ESCORT
122,000 MILES
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SUNNYSUE999
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car idles real rough too fast not enough power starts up easy runs good check vacuum line except for fuel to block where are theyon top end
Feb 26, 2012 at 8:35 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
Pinch off the vacuum hoses that originate on the engine while it's running. If the engine speed comes down, follow that hose to where it branches off and pinch those branches. Keep following the one that lowers engine speed until you find the leak.

If it's not a hose that's leaking, check the intake manifold gasket by spraying water around it while the engine is running and still cold. Look for any place the water gets sucked in and affects how the engine runs.
Feb 26, 2012 at 9:11 PM
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